作者:Sharona Shachan-Tov、Aryeh A. Frimer
DOI:10.1002/jhet.896
日期:2012.7
7‐Hydroxy‐3,4‐dihydrocoumarin‐4‐carboxylic acid (7), conveniently prepared from m‐resorcinol and maleic anhydride, was surprisingly transformed by acid anhydride and pyridine into the corresponding ketone, 4‐alkanoyl analog 11. The latter reacted in turn with acidic alcohol yielding benzofuran‐3‐yl‐acetic ester 16.
7-羟基-3,4-二氢香豆素-4-羧酸(7)中,从方便地制备米-间苯二酚和马来酸酐,令人惊讶地通过酸酐和吡啶转化成相应的酮,4 -烷酰基类似物11。后者又与酸性醇反应生成苯并呋喃-3-基乙酸酯16。